Why is there a sudden large influx of calcium ions into a nerve terminal when the membrane potential repolarizes from a strong depolarization back to resting membrane potential?

Question

Quizplus · Accepted Answer

The driving force for calcium entry is increased when the membrane potential repolarizes because calcium ions move down their electrochemical gradient into the cell, facilitated by the voltage difference across the membrane returning towards resting potential. This creates a favorable condition for calcium to enter the cell, as the inside becomes relatively more negative compared to the outside.

Why Is There a Sudden Large Influx of Calcium Ions